we need some heat over here : updating the speaker load simulator

spkrld sim was getting pret warm after two plus hours of playing
which we no like.
even with master volume (100W op mode) at three, heat persistently accumulated past heatsink ability to dissipate, which was unforeseen.

decided to add small 12v fan
powered by 9v
boosh.

power cell hiding in it's knoll.  pain in the ass to change.